Pivoting frame for lathes of the reproducing type



July 7, 1925. 1,544,875y

E. M. P. AMANN PIVOTING FRAME FOR LATHES OF THE REPRODUCING TYPE Filed Sept. 8, 1924 4 Sheets-Sheet 1 July 7, 1925.

E. M. P. AMANN PIVOTING FRAME FOR LATHES OF THE REPRODUCING TYPE Filed sept. a, i924 4 sheets-sheet z July 7, 1925.

E. M. P. AMANN PIVUTING FRAME FOR LATHES OF THE REPRODUCING TYPE Filed Sept. 8, 1924 4 Sheets-Sheet 5 July 7, 1925.

E. M. P. AMANN PIvo'rING FRAME Fon LA THEs 0F THE REPRODUCING TYPE Filed Sept. 8, 1924 4 ShetS-Sheet 4| UNITED STATES .PATENT OFFICE.

EMILE MARIE PAUL Ammin, or PARIS, rra-ANCE.

riverine riti-snaren 'LA'rriii-s or THE nnrnontoino TYPE;

Application filed September 8, 19.24. Serial No. 736,622.

To all wlw-m it may concern.' ofthe same, are mounted upon the said tube Be it known that l, EMILE MAME PAUL the yaluminium hubs 5, 7 and 71 Which are AMANN, .a citi-Zen of France, and a resident bored and split, and are maintained by cross# of Paris, France, have invented new and iisebolts. The cent-ral hub 5 consists of a long e ful linprove-ments in PivotingFrames for split cylinder having integrall therewith a Lathes of the Reprodueing Type, which isv hollow tra-pezoidal prisrnatie portion 51, Fig. 60 fully set forth in the following specification. 1, which is traversed by a shaft 6, tangent The present invention relates to a pivoting to the tube 1. It will be observed in Fig; 2 frame for lathes serving. .for the reprfoduc that the hubs 7 and 71 andv the portion of the tion of var-ions objects according. to -a given prism 51 situated above .the hub 5 are not iii model, and chiefly for lathes adapted for the line with the part of the prism v51 situated G5 reproduction of shoe lasts. below the said hub. Thesaid frame chiefly provides for the The end hubs 7 and 71, as well as the turning of two pi-eees work mounted in -a prism 51 each have machined surfaces of, 6:1, lo symmetrical position, whereof one-isinade b b1, o 01, Fig. 1. Upon thetliree surfaces to conform to a givenl inodel or lisderived ao1 are respectively disposed the movable 70 therefrom accordi-ng to stated characteristics. stocks 8, S1, 82. Upon the face b b1 is iiiou'nt- 1 The principles ofthe presen-tldevice relate ed the stationary stocky 9 which comprises to the following featureszi two claws 10, 101 by which they pieces y of 20 (af the arrangement is very :rigid and WTO-rk 13,131 can beactuated. Upon the face cannot be put out of shape.y .001 ismouiited thestatioiiarystock 11 with- 75 (fb) the axiallmeg @an bg Aadjusted with in whieh is disposed the shaft 121 carrying vfacility v l the model; the model 12 is held between the (c) a strong construction vis provided for P01111? 21 of the stoolr 8P and the clawv of the 25 the @@ntl'eg of Oscillation gli; th palm; SlOCl IOttl/lOIl .0f the Sllt'fi, lill@ of Said. frame.. model121 is iinpartedvto the pieces of work .S0 {d} ample' space for turning purposes'lis 13 -and 131 'by kthe b evel gears 11 and 15 pyov'ded between the points and relative .to which are disposed within .thestoolz 11, and the .Grwmeten by the bevel gears 16 and 17 disposed within 3o (e) elimination .of L1-1 play @if fthe' gwr the stock 9, the gear 14 being keyed to the teeth between ithe'shaft ofthe :model and the Shaftcarrying :the claw 19, andthe geai1 17 S Shaft. the peceg of woyk. Abeing keyed to a shaft carrying the claws :(f) Suitaible .displacement 0f fthe lathe 10 and 101. Since bevel gears are employed stocks whereby the model oanreadily forthe drive, the `wear of Said' gears can be observed and controlled.V taken up by ix-displacement of the same upon gy the inertia and the resiliency are ifetheir ares, In this manner sharp edges can U0 duced toa minimum. be obtained upon the pieces .of work, the rlhe following Idescription relative tothe saine depending upon the reactions of re- Y appended.drawings Which-are given, by way versal of pressure upon eitherfside of the of'exampleshows an embodimeii'tof the saidv gear teeth, so that the present device will invention. thus affordaccuracy as wellas astrongcon- 95 Figs. 1 and 1fL constitute a :front elevation struction due to the :use of large gear teeth. of a vmachine embodying the present invenr Theclaws lOand 1101 andlthe'claw 19 must tion,vand be situated atvery exactdistances from the 45 Figs. 2 and 21 constitute a side elevation central axis, and in consideration of the` of the apparatussl'iown tin Figs, 1 and 11. dimensions of the pivoting frame, the object 10U Upon the tubular steel shaft 1 of .large ofthe invention, it may happenthat the borcross section are mounted rtwo substantial ing machine which is employed is not su'iball-beariiigs 2, 21 which are disposed withciently accuratefbntthe disposition adopted 50, ing the bored-out portionof the bearings 3, for the niountingof the stocks =9 and 11 31 pertaining to the main structure of the which may be set `byqnieaiisvof thin strips JW. lathe 4, which is shown in the dot and dash and pins will provide for an exact as well as lines, Figs. 2 and 21. Between the sets of steady position of the claws 10, 101 and 1 9. bearings 3, 2 and 31, .21 and also at the sides The` points 2O and 2G1canbeadpisted in like manner, but their angular position relative to the said claws can also be changed by turning, upon the shaft l, the hubs 7 and 71 which are then clamped in their new position. The arrangement of the stocks- S, 9 and 81 in the W form permits work of large diameter to be turned in the lathe, due to the large space between the branches of the W.

rl`he use of the bolts situated upon the faces a, al, which have a uniform spacing, will also provide for each of the movable stocks 8, 81, 82 a certain number of longitudinal ypositions depending upon the number of holes, by the progressive displacement of the stocks upon their supports (three in the present case).

in order to bring each of the points 20, 201 and 2l into the desired position, it will suffice to act' upon the respective hand wheels 27?, 2'?, 27? which are secured to the screwthreaded portions 23, 22, 211, thereby displacing' the nuts 25, 24:, 241 and hence the soci-iets 262 2G, 261 secured to the points 20, 201, 2l, respectively.

Fie'. 2 shows the said pivoting frame in the operative position, wherein its arm 32, which is secured to the prismaticl element 51 and braced at the upper part by the hand Vrail 33, is brought back by the elastic meinber 51 in suoli manner that the model l2 enters into contact with the tracing element 30. This latter is supported in the known manner by the slide 50 which is moved forward in the same manner as the upper slide SG, due to the rotation of the drum 35. The slide 36 is provided with the cutters 37 acting upon the pieces of work 13 and 131.

lt should be observed that in the inoperative 'position of the frame shown by the dotted lines at 3d, F ig. 2, a great advantage is had by the relative displacement of the axes of the parts of the said frame situated above and` below the central tube l, for if the said parts had no such displacement, the lower part would enter into contact with the controlling drums 35; further, the said Vdisplacement provides for a suitable position of the shaft 6 connecting the model shaft with the working shaft, in which it will not come into contact with the central tube.

The eye of the workman occupied with the said machine, Fig. 2, is enabled to observe the model as well as the reproducing element 30 which he controls, and also the piece of work, and he also observes the said cutters when in operation.

rlhe movement of rotation is imparted to the shaft of the model through the medium of the pulley 39 which is keyed to the end of the shaft 3S disposed within the tube l and whereof the end has mounted thereon the supporting pulley 40, connected by belt with the pulley 4l which is keyed to the shaft of the model 121.

Obviously, the said arrangements are susceptible of modifications in detail without departing from the principle of the invention.

ivhat I claim is:

l. A pivoting frame for reproducing lathes comprising a stationary shaft, a sleeve clamped to the said shaft and forming a. hub, an arm integral therewith and extending in a direction perpendicular to the axis of the shaft, ay stock adjustably mounted upon said arm, a. claw revoluble in said stock, a second stock situated opposite the first-mentioned stock and cooperating therewith to hold the piece of work, a second arm secured to said sleeve and eX- tending in a direction perpendicular to the axis of the said shaft and on the other side of the first-mentioned arm, two stocks adjustably mounted on the end of the second arm, a stationary pointed member adjustably mounted in one of the said stocks and a claw mounted in the second stock and cooperating with said pointed member in order to hold the model, means actuating the said claw whereby the model can be rotated, a set of bevel gears actuated by the said claw, a shaft which is rotated by the said gears and traverses the two arms tangentially to the fixed pivot shaft, a second set of bevel gears imparting the rotation of the said claw maintaining' and rotating the model to the claw maintaining and rotating the piece of work.

2. A pivoting frame for reproducing lathes comprising a stationary shaft, a sleeve clamped to the said shaft and forming a hub, an arm integral therewith and extending in a direction perpendicular to the axis of the shaft, a stock adjustably mounted upon said arm, a claw revoluble in said stock, a second clamped sleeve forming a hub at one end of the shaft, an arm integral with said sleeve and extending in such manner as to form a V with the iirst-mentioned arm, a stock adjustably mounted in said second arm, al pointed member adjustably mounted in said stock and cooperating with the said claw in order to hold the piecefof work, a third arm integral with the firstmentioned sleeve and extending on the opposite side of the shaft to the first and second arms, two stocks placed in a V disposition and adjustably mounted at the end of the third arm, a stationary pointed member adjustably mounted in one of the said stocks and a claw mounted in the second stock and cooperating with said pointed-member in order to hold the model, means actuating the said last-named claw whereby the model an be rotated, a set of bevel gears actuated f by the said claw, a shaft which is rotated by the said gears and traverses the two arms tangentlally to the fixed pivot shaft, a second set of bevel gears imparting the rotation and revolubly mounted in the of the said claw maii'itaining and rotating the model to the claw maintaining and r"otating tlie'piece of work.

A3. A pivoting frame for reproducing lathes comprising a stationary shaft, a 'sleeve clamped to the said shaft and formingy a cen'- 'tral hub, a central arm integral therewith and extending in a direction, perpendicular to the axis of the shaft, a central stock adjustably mounted upon the said arm, two

oppositely-directed claws secured together said stock, two clamped sleeves forming lateral hubs at the ends of the said shaft, two arms respectively integral therewith and extending in such manner as toform a W with the said central arm, two stocks respectively mounted in an in one of the said stocks and a claw mounted m the second stock and cooperating with' said po-inted member in order to hold the model, means actuating the said claw whereby the model can be rotated, a set of bevel gears actuated by the said claw, a shaft which is rotated by the said gears and traverses the two arms tangentially to the fixed pivot shaft, a second set of bevel gears imparting the rotation of the said claw maintaining and rotating the model to the claw maintaining and rotating the piece of work.

e. A pivoting frame for reproducing lathes comprising a stationary shaft, a sleeve clamped to the said shaft and forming a hub, an arm integral therewith and extending in a direction perpendicular to the axis of the shaft, a properly machined flat surface formed at the end of the said arm, a stock, a properly machined flat surface formed thereon and cooperating with the flat surface of thel arm, means for securing said stoclr to the arm in an adjustable manner, the said fiat surfaces being placed in contact, claw revoluble in the said stock, a second clamped sleeve forming a hubA at the end of the sha-ft, an arm integral with said sleeve and having a properly machined flat surface at the end, a stock so disposed as to form a V with the first-mentioned stock, a flat surface formed at the end of said stock and cooperating with the flat surface of the arm, means for securing the stock and the arm in an adjustable'manner, the flat surfaces being placed in contact, a pointed member adjustably mounted in the stock, a

`third arin integral with the first-mentioned sleeve and extending on the opposite side, a properly machined surface formed at the end of the said arm,two stocks placed in ily dis-position, properly machined surfaces formed at lthe ends of the said stocks and ycooperating with the flat surface ofthe arm, inea-ns for securing said stocks tothe arm inv an adjustable'manner, the hat surfaces being placed in contact, a stationaryy pointed member adjustablyrmounted'in one of the said stocks and a claw mounted in the second stock and cooperating with said pointed member in order to hold the model, means actuating the said claw whereby the model can be rotated, a set of bevel gears actuated by the said claw, a shaft which is rotated by the said gears and traverses the two arms ta-ngentially to the fixed pivot shaft, a second set of bevel gears imparting the rotation 0f the said claw maintaining and rotating the model tothe claw maintaining and rotating the piece of work.

5. A pivoting lathes comprising a central,y shaft, a sleeve clamped to the said shaft and forming a central hub, a central arm integral therewith and extending in a direction perpendicular to the axis of the shaft, two clamped sleeves forming lateral hubs at the ends of the shaft, two lateral arms respectively integral with said lateral sleeves forming a W with the said central arm, a V-shaped arm integral with the central hub and extending in the opposite direction, properly machined flat surfaces formed at the ends of said arm, five .stocks whereofthree are situated on one side of the shaft and two on the other side ofthe same, properly machined flat surfaces formed at the ends of said stocks, means for securing said stocks to the respective arms in an adjustable manner, the flat surfaces being placed in contact, means for holding the model between the two stocks of the said arms placed in the V disposition, means for holding the pieces of work at the saine time between the stocks of the said arms placed in the W disposition, and means for imparting the rotation of the model to the pieces of work.

f 6. A pivoting frame for reproducing lathes comprising a stationary shaft, a sleeve clamped to the said shaft and forming a hub, an arm integral therewith and extending in a direction perpendicular to the axis of the shaft, a stock adjustably mounted upon the said arm, a claw revolub-le in said stock, a

second stock situated opposite the first-mentioned stock and cooperating therewith to hold the piece of work, a second arm secured to said sleeve'and extending in a direction frame for reproducing perpendicular to the axis 'of the said shaft and on the other side of the first-mentionedV arm, two stocks adjustably mounted on the end of the second arm, a stationary pointed member adjustably mounted in one of the Said stocks and a claw mounted in the second stock and cooperating with the said pointed member in order to hold the model7 means for actuating the said Claw whereby the model can be rotated, a set of bevel gears actuated by the Said claw, a shaft which is rotated by the said gears and traverses the two arms t( ngentially to the liXed pivot shaft, a

() second set of bevel Oears im Jartincr the rotation of the said claw maintaining and rotating the model to the claw maintaining and rotating the piece of Work, a tracing device of a known type7 and a reaction spring maintaining the said model in Contact With said tracing device.

In testimony whereof l have signed this Specification.v

EMILE MARIE PAUL AMANN. 

